Core Concept: Charging Cycles ≠ Charging Times
A lithium-ion battery's lifespan is measured by charging cycles, not the number of charging times.One full charging cycle means the battery is fully discharged and then fully recharged.For example, using 50% of the power and recharging it twice only counts as one cycle, not two.
Typical Lifespan of Lithium Batteries
Most standard lithium-ion batteries have a lifespan of 300 to 500 full charge cycles.After 500 cycles, high-quality lithium batteries still retain about 80% of their original capacity.Under normal daily use, a lithium battery can work well for 2 to 3 years.
Key Factors Affecting Battery Life
1：Temperature
- Using or storing batteries above 35°C will accelerate capacity loss.
- Using batteries below 4°C temporarily reduces working time (performance recovers when temperature rises).
- The optimal operating temperature is 20°C ±5°C.
2：Charging Habits
- Shallow charge and shallow discharge are better for extending battery life.
- Avoid full 0–100% deep cycles, except for monthly battery calibration.
- Do not overcharge; unplug the charger once fully charged.
3：Usage Frequency
- Regular use keeps lithium ions active and maintains battery performance.
- If not used frequently, complete one full charge-discharge cycle per month.
Common Misunderstandings
- "500 charges mean the battery is dead"Correction: It refers to 500 cycles, not 500 charging operations.
- "Must discharge to 0% before charging"Correction: Deep discharge damages lithium batteries; it is recommended to charge when power is below 10%.
- "Low temperature permanently damages batteries"Correction: Low temperature only temporarily reduces performance, without permanent damage.
Tips to Extend Lithium Battery Life
- Charge at any time without waiting for full discharge.
- Use original or certified chargers.
- Avoid placing devices in hot cars or direct sunlight.
- Keep the battery at 40%–60% charge for long-term storage.
